Drag is the thing here...
My ASW24, being lighter than, say, a ASK-21, will get 200mts (600ft) from a
high speed pull up. The ASK will get 100 to 130mts.
A Blanik will get much less.
A ballasted ASW-24 gets more from the pull up than I do unballasted.
In our kind of flying drag is everything! Why an ASK-13 flyes less than
a -21, a -24, a -25 and so on? How can we explain such large differences in
performance? Drag is reduced for the newer gliders.
You are all right with the math, and in the total energy equations mass is
nonrelevant as it is a constant. But you're all disregarding the effect of
drag and you cannot do that! That is the reason why all the fancy math
you're doing does not match with our real life experience. And if a
theorical reasoning does not match with reality, then it's obvious that the
theory is somewhere wrong.
So please if you want to get into math please do account drag and fluid
mechanics into it. If you simplify it so much, it will be inaccurate enought
to be false.
Ballasted gliders will go higer because of the increased mass, more
penetration and more energy for the same aerodinamic drag.

"Bruce Hoult" escribió en el mensaje
...
In article ,
Kevin Neave k
wrote:

Lots of maths snipped...